AT&T has indicated through its forums that it will provide a system update for its Windows Phone devices (including the HTC Titan, Samsung Focus and others) at some point in the coming months.
For unknown reasons, AT&T has not distributed the 8107 system update. This update fixes several bugs as well as boosts performance. The company is looking at delivering Tango, or Consumer Release 3 (CR3) of Windows Phone, down the line. When it arrives, this update will include the 8107 fixes and more.